Concave for threshing-machines.



No. 755,152. PA-TBNTED MAR. 22', 1904! s. s. MISHLER. GONOAVB FORTHRESHING MACHINES.

APPLICATION FILED APR. 4. 1993.

' I0 lonnL.

' UNITED STATES Patented. March 2'2, 1904.

PATENT OFFICE.

SYLVESTER S. MISHLER, OF DAVID CITY, NEBRASKA, ASSIGNOR OF ONE- HALF TOMANNA KELLER, OF OCTAVIA, NEBRASKA.

QONCAVE FOR THRESHI'NG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 55,152, dated'March 22,1904.

' Application filed. April 4,1908. Serial No. 151,119. (No model.)

a citizen of the United States, residing at David- City, in the countyof Butler and State of Ne braska, have invented a new and useful Concavefor Threshing-Machines, of which the following is a specification.

This invention relates generally to threshing-machines, and moreparticularly to an improved construction of concave, the object being toprovide a reversible concave which can be reversed or changed withoutremoving the said concave or any of its parts from the machine.

With this object in view the invention consists in constructing theconcave from a series of sections, each section being concave upon bothfaces and provided with teeth or spikes, the edges of each section beingslotted to permit the grain to drop therethrough.

The invention consists also in providing certain locking devices forlocking the sections after they have been properly adjusted.

The invention consists also in certain details of construction andnovelties of combination, all of which will be fully describedhereinafter and pointed out in the claims. V

In the drawings forming part of this specification, Figure l is aperspective view of a concave constructed in accordance with myinvention. Fig. 2 is a vertical sectional view of the same. Fig. 3 is atransverse sectional view. Fig. A is a detail perspective view showing aportion of one of the sections of the concave. Fig. 5 is a detailperspective view of one of the locking-plates.

In constructing a concave in accordance with my invention I employ aplurality of its upper and lower faces, as shown at A, and one concaveupper face is provided with a series of teeth or spikes A and theopposite edges of each section are provided with a series of slots Asaid slots being provided for the purpose of permitting the grain todrop through the concave. Each section is supported upon a bar B, whichpasses longitudinally through the section, the ends of said bars beingjournaled in the curved plates O,

secured upon the interior of the casing of the 5 machine. The bars Bextend through the curved plates and through both sides of the casing,as shown at B, said extended ends being polygonal in cross-section, andfitting upon said extended ends are the locking-plates D, each platehaving a polygonal-shaped opening D, and the ends are serrated ornotched, as

at D the serrations or notches of one plate engaging the serrations ornotches of the next adjacent plate, so that the entire series of 06plates are locked together, thereby holding the sections of the concavelocked. Inasmuch as the sections of the concave are reversible, any oneor more sections can be quickly and easily reversed by sliding thelocking-plate 5 outwardly upon the extended end of the bar and thenturning the said bar one-half around, such one-half rotation serving tobring up the other face of the concave-section, and after the saidsection has been adjusted the lock- 7 ing-plate is pushed back to itsproper position, and the concave-section is then securely locked.

It .will thus be seen that I provide an exceedingly cheap, simple, andefficient construction of concave for threshing-machines and one whichcan be quickly and easily reversed without removing any portion thereoffrom the machine and one which can be either partially or totallyreversed, inasmuch as the said concave is made of similar sections.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is sections A, each section beingconcaved upon 4 1. A concave for threshing-machines comprising aplurality of similar sections, each section being reversible andprovided with teeth or spikes and having its edges slotted, as setforth.

2. A concave for threshing-machines com- 9 prising a plurality ofsections, each section being reversible and having its upper and lowerface concaved, one of said faces being provided with teeth or spikes,the edges of each section being provided With a series of slots, thebars for supporting the sections, the bearing-plates in Which the barsare journaled, and the locking-plates carried upon the extended ends ofthe bars, said locking-plates being adapted to engage one another,substantially as set forth.

SYLVESTER S. MISHLER.

Witnesses:

J. IRA DUNCAN, F. L. HUMFAL.

